Ritter, Bob, 1950- Nelson biology 11 / Bob Ritter, Christine Adam-Carr, Douglas Fraser ; program consultant, Maurice Di Giuseppe. - Toronto, Ont. : Nelson/Thomson Learning, c2002. - viii, 660 p. : ill. ; 29 cm. Includes index. ISBN: 0176121382 (hbk) Subjects--Topical Terms: Biology. Dewey Class. No.: 570 / RIT